Santa Susana Mountains
Mountain range of the Transverse Ranges in California
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| 2023 | The RAC study report was published, concluding that air measurement data and soil sampling showed no evidence of SSFL impact in offsite soils from the Woolsey Fire. |
| 2023 | Plaintiffs petitioned the California Supreme Court to review the case, which was subsequently denied. |
| October 2023 | The current National Pollution Discharge Elimination System (NPDES) Permit for the Santa Susana Field Laboratory was issued, regulating surface water discharge limits for radionuclides and chemicals. |
| June 2023 | DTSC issued the Final Program Environmental Impact Report for the Santa Susana Field Laboratory after considering community input, reaffirming support for the 2010 Administrative Order on Consent (AOC) requirements for cleanup of radionuclides and chemicals to background levels. |
| June 2023 | DTSC released a revised version of the draft PEIR with unspecified deletions and additions, the purpose of which was not immediately clear. |
| May 2023 | The California Appeals Court reaffirmed the lower Court's decision, denying the plaintiffs' petition regarding the demolition of buildings. |
| August 2022 | Boeing and the Los Angeles Regional Water Quality Control Board (LARWQCB) signed a Memorandum of Understanding (MOU) detailing future storm water management requirements after the completion of SSFL soil remediation. |
| May 2022 | DTSC and Boeing signed a Settlement Agreement committing Boeing to cleanup chemicals to a residential risk-based garden standard and cleanup radionuclides to background levels in Area I, III, and the southern buffer zone. The agreement was criticized by community groups and local governments for being conducted secretly without public input. |
| 2021 | A three-hour documentary titled 'In the Dark of the Valley' was released, featuring mothers advocating for site cleanup due to children suffering from cancer believed to be linked to site contamination. |
| 2021 | A study collecting 360 samples of dust, ash, and soils found that while there was no widespread deposition of radioactive particles, two locations contained high activities of radioactive isotopes associated with SSFL, suggesting limited spread of radioactive microparticles. |
| 2020 | The California Department of Toxic Substances Control (DTSC) issued a final report concluding that the Woolsey Fire did not cause contaminants to be released from the site into neighboring communities. |
| October 2020 | DTSC and DOE signed an Amendment to Order on Consent covering the demolition and disposal of eight DOE-owned facilities, mandating that all demolition debris be disposed of out of California to a licensed Mixed Low-Level Radioactive Waste (MLLRW) disposal facility, despite most buildings being confirmed as clean or having no radiological history. |
| September 2020 | NASA issued its Record of Decision (ROD) for the Supplemental EIS, identifying Alternative C (Suburban Residential Cleanup) as the Agency-Preferred Alternative, which did not fully comply with the DTSC 2010 AOC 'cleanup to background' mandate. |
| July 2020 | NASA issued its Final Supplemental Environmental Impact Statement (EIS) for Soil Cleanup Activities at the Santa Susana Field Laboratory. |
| May 2020 | DTSC and DOE signed an Order on Consent for Interim Response Action at the Radioactive Material Handling Facility (RMHF) Complex, requiring all demolition debris to be disposed of outside California at a licensed radioactive waste disposal facility. |
| 2019 | Boeing funded a Risk Assessment Corporation (RAC) study that conducted soil sampling around SSFL and performed atmospheric transport and deposition modeling related to the Woolsey Fire. |
| November 2018 | DOE issued the final Environmental Impact Statement (EIS), which came over 11 years after Judge Conti's original order. |
| November 2018 | The Superior Court of California ruled in favor of the defendants in the demolition debris lawsuit. |
| November 2018 | The Woolsey Fire began at the Santa Susana Field Laboratory (SSFL), burning approximately 80% of the site. The fire raised concerns about potential radioactive material dispersal. |
| September 2017 | California Department of Toxic Substances Control (DTSC) issued its Draft Program Environmental Impact Report (PEIR) for the Santa Susana Field Laboratory, initiating a comprehensive environmental review process. |
| January 2017 | DOE issues its Draft Santa Susana Field Laboratory Area IV Environmental Impact Statement. |
| March 2014 | NASA issued its Final Environmental Impact Statement for Proposed Demolition and Environmental Cleanup Activities at Santa Susana Field Laboratory, addressing potential environmental impacts of cleanup efforts. |
| 2013 | Boeing proposed demolishing 6 remaining former radiological buildings in Area IV, which faced significant local resistance. |
| August 2013 | Physicians for Social Responsibility - Los Angeles (PSR-LA) and other groups filed a lawsuit against DTSC, CDPH, and Boeing, challenging the demolition and disposal of building debris. |
| 2012 | The Community Advisory Group's petition was approved. |
| 2010 | Boeing began demolishing 40 remaining non-radiological buildings in Areas I, III, and IV of Santa Susana Field Laboratory, following procedures approved by the Department of Toxic Substances Control (DTSC). |
| March 2010 | A petition to form a Community Advisory Group (CAG) was denied by DTSC (Department of Toxic Substances Control). |
This contents of the box above is based on material from the Wikipedia article Santa Susana Field Laboratory, which is released under the Creative Commons Attribution-ShareAlike 4.0 International License.